What gifts should Detroit bear to Amazon's Bezos?

The race to lure Amazon's HQ2 is turning into a gift competition, apparently.

An economic development group in Tucson, Ariz., sent a 21-foot saguaro cactus on a flatbed truck to Amazon founder Jeff Bezos in Seattle.

Why? "We want to break through the clutter and be noticed by Amazon," Joe Snell, president and CEO of Sun Corridor Inc. told the Arizona Daily Star.

We're not sure cluttering up Bezos' lawn is the way to go, but it does raise the question: What would Detroit's unique gift be? A replica of the giant tire on I-94? Girders from the Silverdome? Fresh-picked cattails from Belle Isle?